Techniques for determining upstream nodes in full duplex wireless communications

Abstract

Aspects described herein relate to determining, by a node, to establish a first backhaul connection with a first upstream node for access link communications with a first downstream node, determining, by the node, to establish a second backhaul connection with a second upstream node for access link communications with a second downstream node, establishing the first backhaul connection with the first upstream node based on a first transmit/receive beam pair, and establishing the second backhaul connection with the second upstream node based on a second transmit/receive beam pair and while the first backhaul connection is established with the first upstream node.

What is claimed is: 
     
       1. A method of wireless communication, comprising:
 determining, by a node, to establish a first backhaul connection with a first upstream node for access link communications with a first downstream node; 
 determining, by the node, to establish a second backhaul connection with a second upstream node for access link communications with a second downstream node; 
 establishing the first backhaul connection with the first upstream node based on a first transmit/receive beam pair where at least a first receive beam of the first transmit/receive beam pair is determined to have less than a first threshold level of self-interference from access link transmission to the first downstream node; and 
 establishing, while the first backhaul connection is established with the first upstream node, the second backhaul connection with the second upstream node based on a second transmit/receive beam pair where at least a second receive beam of the second transmit/receive beam pair is determined to have less than a second threshold level of self-interference from access link transmission to the second downstream node. 
 
     
     
       2. The method of  claim 1 , further comprising performing beam training to determine signal measurements related to multiple transmit beams and multiple receive beams, wherein the first receive beam is determined to have less than the first threshold level of self-interference based on one or more of the signal measurements determined based on the beam training. 
     
     
       3. The method of  claim 2 , wherein the second receive beam is determined to have less than the second threshold level of self-interference based on one or more of the signal measurements determined based on the beam training. 
     
     
       4. The method of  claim 2 , wherein determining to establish the first backhaul connection and determining to establish the second backhaul connection is based on comparing a first signal strength or quality measurement of a first signal received over the first receive beam to a first threshold, and comparing a second signal strength or quality measurement of a second signal received over the second receive beam to a second threshold. 
     
     
       5. The method of  claim 4 , wherein the first signal strength or quality measurement and the second signal strength or quality measurement correspond to at least one of a signal-to-noise ratio (SNR) or a signal-to-interference-and-noise ratio (SINK). 
     
     
       6. The method of  claim 1 , further comprising performing beam training and sending one or more beam reports to a centralized entity, wherein determining to establish the first backhaul connection and determining to establish the second backhaul connection are based on one or more commands received from the centralized entity based on the one or more beam reports. 
     
     
       7. The method of  claim 1 , wherein the node, the first upstream node, or the second upstream node includes at least one of an integrated access and backhaul (IAB) node, a user equipment (UE), a customer premises equipment (CPE), an access point, a relay node, or a repeater. 
     
     
       8. An apparatus for wireless communication, comprising:
 a transceiver; 
 a memory configured to store instructions; and 
 one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to:
 determine to establish a first backhaul connection with a first upstream node for access link communications with a first downstream node; 
 determine to establish a second backhaul connection with a second upstream node for access link communications with a second downstream node; 
 establish the first backhaul connection with the first upstream node based on a first transmit/receive beam pair where at least a first receive beam of the first transmit/receive beam pair is determined to have less than a first threshold level of self-interference from access link transmission to the first downstream node; and 
 establish, while the first backhaul connection is established with the first upstream node, the second backhaul connection with the second upstream node based on a second transmit/receive beam pair where at least a second receive beam of the second transmit/receive beam pair is determined to have less than a second threshold level of self-interference from access link transmission to the second downstream node. 
 
 
     
     
       9. The apparatus of  claim 8 , wherein the one or more processors are further configured to perform beam training to determine signal measurements related to multiple transmit beams and multiple receive beams, wherein the first receive beam is determined to have less than the first threshold level of self-interference based on one or more of the signal measurements determined based on the beam training. 
     
     
       10. The apparatus of  claim 9 , the second receive beam is determined to have less than the second threshold level of self-interference based on one or more of the signal measurements determined based on the beam training. 
     
     
       11. The apparatus of  claim 9 , wherein the one or more processors are configured to determine to establish the first backhaul connection and determine to establish the second backhaul connection based on comparing a first signal strength or quality measurement of a first signal received over the first receive beam to a first threshold, and comparing a second signal strength or quality measurement of a second signal received over the second receive beam to a second threshold. 
     
     
       12. The apparatus of  claim 11 , wherein the first signal strength or quality measurement and the second signal strength or quality measurement correspond to at least one of a signal-to-noise ratio (SNR) or a signal-to-interference-and-noise ratio (SINK). 
     
     
       13. The apparatus of  claim 8 , wherein the one or more processors are further configured to perform beam training and send one or more beam reports to a centralized entity, wherein the one or more processors are configured to determine to establish the first backhaul connection and determine to establish the second backhaul connection based on one or more commands received from the centralized entity based on the one or more beam reports. 
     
     
       14. The apparatus of  claim 8 , wherein the apparatus, the first upstream node, or the second upstream node includes at least one of an integrated access and backhaul (IAB) node, a user equipment (UE), a customer premises equipment (CPE), an access point, a relay node, or a repeater. 
     
     
       15. An apparatus for wireless communication, comprising:
 means for determining to establish a first backhaul connection with a first upstream node for access link communications with a first downstream node; 
 means for determining to establish a second backhaul connection with a second upstream node for access link communications with a second downstream node; 
 means for establishing the first backhaul connection with the first upstream node based on a first transmit/receive beam pair where at least a first receive beam of the first transmit/receive beam pair is determined to have less than a first threshold level of self-interference from access link transmission to the first downstream node; and 
 means for establishing, while the first backhaul connection is established with the first upstream node, the second backhaul connection with the second upstream node based on a second transmit/receive beam pair where at least a second receive beam of the second transmit/receive beam pair is determined to have less than a second threshold level of self-interference from access link transmission to the second downstream node. 
 
     
     
       16. The apparatus of  claim 15 , further comprising means for performing beam training to determine signal measurements related to multiple transmit beams and multiple receive beams, wherein the first receive beam is determined to have less than the first threshold level of self-interference based on one or more of the signal measurements determined based on the beam training. 
     
     
       17. The apparatus of  claim 16 , wherein the second receive beam is determined to have less than the second threshold level of self-interference based on one or more of the signal measurements determined based on the beam training. 
     
     
       18. The apparatus of  claim 16 , wherein the means for determining to establish the first backhaul connection and determining to establish the second backhaul connection is based on comparing a first signal strength or quality measurement of a first signal received over the first receive beam to a first threshold, and comparing a second signal strength or quality measurement of a second signal received over the second receive beam to a second threshold. 
     
     
       19. The apparatus of  claim 18 , wherein the first signal strength or quality measurement and the second signal strength or quality measurement correspond to at least one of a signal-to-noise ratio (SNR) or a signal-to-interference-and-noise ratio (SINK). 
     
     
       20. The apparatus of  claim 15 , further comprising means for performing beam training and sending one or more beam reports to a centralized entity, wherein the means for determining to establish the first backhaul connection determines to establish the first backhaul connection based on one or more commands received from the centralized entity based on the one or more beam reports, and wherein the means for determining to establish the second backhaul connection determines to establish the second backhaul connection based on one or more commands received from the centralized entity based on the one or more beam reports. 
     
     
       21. The apparatus of  claim 15 , wherein the apparatus, the first upstream node, or the second upstream node includes at least one of an integrated access and backhaul (IAB) node, a user equipment (UE), a customer premises equipment (CPE), an access point, a relay node, or a repeater. 
     
     
       22. A non-transitory computer-readable medium, comprising code executable by one or more processors to perform wireless communications, the code comprising code for:
 determining, by a node, to establish a first backhaul connection with a first upstream node for access link communications with a first downstream node; 
 determining, by the node, to establish a second backhaul connection with a second upstream node for access link communications with a second downstream node; 
 establishing the first backhaul connection with the first upstream node based on a first transmit/receive beam pair where at least a first receive beam of the first transmit/receive beam pair is determined to have less than a first threshold level of self-interference from access link transmission to the first downstream node; and 
 establishing, while the first backhaul connection is established with the first upstream node, the second backhaul connection with the second upstream node based on a second transmit/receive beam pair where at least a second receive beam of the second transmit/receive beam pair is determined to have less than a second threshold level of self-interference from access link transmission to the second downstream node. 
 
     
     
       23. The non-transitory computer-readable medium of  claim 22 , further comprising code for performing beam training to determine signal measurements related to multiple transmit beams and multiple receive beams, wherein the first receive beam is determined to have less than the first threshold level of self-interference based on one or more of the signal measurements determined based on the beam training. 
     
     
       24. The non-transitory computer-readable medium of  claim 23 , wherein the second receive beam is determined to have less than the second threshold level of self-interference based on one or more of the signal measurements determined based on the beam training. 
     
     
       25. The non-transitory computer-readable medium of  claim 23 , wherein the code for determining to establish the first backhaul connection and determining to establish the second backhaul connection is based on comparing a first signal strength or quality measurement of a first signal received over the first receive beam to a first threshold, and comparing a second signal strength or quality measurement of a second signal received over the second receive beam to a second threshold. 
     
     
       26. The non-transitory computer-readable medium of  claim 25 , wherein the first signal strength or quality measurement and the second signal strength or quality measurement correspond to at least one of a signal-to-noise ratio (SNR) or a signal-to-interference-and-noise ratio (SINR). 
     
     
       27. The non-transitory computer-readable medium of  claim 22 , further comprising code for performing beam training and sending one or more beam reports to a centralized entity, wherein the code for determining to establish the first backhaul connection determines to establish the first backhaul connection based on one or more commands received from the centralized entity based on the one or more beam reports, and wherein the code for determining to establish the second backhaul connection determines to establish the second backhaul connection based on one or more commands received from the centralized entity based on the one or more beam reports. 
     
     
       28. The non-transitory computer-readable medium of  claim 22 , wherein the node, the first upstream node, or the second upstream node includes at least one of an integrated access and backhaul (IAB) node, a user equipment (UE), a customer premises equipment (CPE), an access point, a relay node, or a repeater.